<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>css盒子模型</title>

    <style>
        .demo {
            background-color: aqua;
            display: inline;
            border: 5px solid yellowgreen;
            padding: 5px;
            margin: 40px;
        }
        .border-demo {
            background-color: yellow;
            width: 300px;
            height: 200px;
            border-style: solid dashed double dotted;
            border-width: 10px 0 20px 40px;
            border-color: blueviolet;
            /* border-left: ; */
        }
    </style>
</head>
<body>
    <div class="demo">B站搜索 目不窥园</div>
    <div class="border-demo">这是一个边框示例</div>
</body>
</html>